Gun perforator



y Oct, 1o, 1944.

AG. F. TURECHEK GUN PERFORATOR AFiled sept. 15, 1945 mmszemm A TT'OR/VEY i if @aaron George F. cheb, Los Angeles, Calif., assigner toLane-Wells Compy, Los Angeles, Calif., a

corporation of Delaware is on. My invention relates to gun Perfex-atomthm.,

is. to devices adapted to be lowered within a well casing for thepurpose of penetrating the wells thereof and permitting the entrance ofiluids. .Among the objects of my invention are:

First, to provide a gun perforator wherein a large number of gun unitsare incorporated in a unitary gun body and wherein only minimum i axialspacing between the gun bores of adjacent units is required;

Second, to provide 9. gun perforator wherein the gun bores occupy .amaximum proportionof the guns diameter, the gun perforator cartridgesforeach gun unit being positioned in a plane oset from its gun bore sothat virtually no portion of the gun perforators diameter in theplaneout the need of electrical wiring through the gunl body: and

Fifth, to provide a gun perforator wherein the gun units are arranged insets, the member of each set adapted to iire simultaneously and theseveral sets being staggered with respect to each other so that theaxial displacement of gun units belonging to the same set may be ampletor prevent undue stress on the surrounding casing without necessitatingan excessive length of gun body.

With the above and other objects in view, as may appear hereinafter,reference is directed to the accompanying drawing, in which:

Figure 1 is a. side elevational view of a-gu perforator incorporating myinvention;

Figure 2 is an enlarged transverse sectional view through 2-2 of Figure1;

Figure 3 is an enlarged fragmentaryrlongitudinal sectional view through3-3 of Figure 2;

In the illustration three sets of bores are shown, pointing in threelateral directions and `arcuately spaced 120. The gun bores of theseveral sets are staggered so that every third gun bore belongs to thesame set. Each set of gun bores is intersected at its inner` or base endby a' longitudinallyextending flame passage 3. The passages 3 aresmaller in rdiameter than the gun bores and each gun bore receives abullet 4 which is adapted to rest against the rear end of the gun borewithout completely closing the ame passage. Each bullet t is covered bya seal cap 5 of rubber or similar material, the bore outwardly therefrombeing exposed to the well iluid in which the gun may be submerged. f

Below or above each gun bore and parallel therewith is a. cartridge bore5, the inner end of which intersects the flame passage 3 and the outerend of which is enlarged and screw-threaded. The inner portion of thecartridge bore 6 receives a cartridge I- and the outer screw-threadedportion receives a plug 8.

The upper end of the gun body I is-provided with axially extendingcounterbores which communicate with the llame passages 3. Thecounterbores receive ignition cartridges 3 and are sealed by ignitioncartridge plugs I0. The upper end of the gun body is adapted to lbescrewthreaded to a cable head II and the connection between the gun bodyand cable head incorporates a suitableelectrical contact means I2 whichFigure 5 is a fragmentary longitudinal sectional view through 5-5 ofFigure 4.

A gun body I in the'form of a solid cylinder is provided with aplurality of laterally directed gun bores 2. These are arranged inseveral sets.

extreme rapidity so that the `cartridges are ignited virtuallysimultaneously, andthe pressure within the iiame passage developssubstantially uniformly throughout its length vand drives the bullets`simultaneously from the gufi` bores.

Therefore, verylittle erosion of thev llame `passage 3 occurs, exceptbetween the cartridgel bore 6 and its corresponding or adjacent gun bore2. However, very substantialve'rosion may take place in this relativelyshort portion of the llame passage 3 before the performance of,the gunperforator is affected.

The construction shown in Figures 4 and 5 difvfers from the previouslydescribed structure in that the name passage 2| therein is onsetarcuately from the gun bore 22. there being a short preferably only inan amount sunicient toalign with the offset name passage 2l. The sockets23, being of small diameter, form, with the main gun bores 22. abutmentsfor limiting rearward movement of the bullet 4, as shown in Figure 4. Inthis construction the flame passage 2i is adapted to receive an ignitioncord or fuse 2l, preferably a fuse in which the ignition impulse moveswith extreme rapidity. fuses of this type being known commercially asPermacoxd In the construction shown in Figures 4. and 5 the fuse cords25 are ignited by the ignition cartridges s. as in the nrst describedsructme. The ignition impulse actually travels faster in Permacord thanin the open passageway l, so that ignition pf the several cartridgesapproaches the simultaneous.

Various changes and alternate arrangements may be made within the scopeof the appended claims, in which it is my intention to claim al1 noveltyinherent in the invention.

l. A gun perforator comprising: a gun body defining at least onelongitudinally extending ignition passage, a plurality of transverselyextending gun bores communicating with said passage, and a plurality oftransversely directed cartridge bores also communicating with saidpassage; bullets for said gun bores; and cartridges and seal plugs forsaid cartridge bores.

2. A gun perforator comprising: a. gun body defining at least onelongitudinally extending ignition passage. a plurality of transverselyextending gun bores communicating with said passage, and a plurality oftransversely directed cartridge bores also communicating with saidpassage; bullets for said gun bores; cartridges and seal plugs for said'cartridge bores: said gun and cartridge/bores being larger in diameterthan said ignition passage and terminating short of complete transectionthereof to form stops limiting movement or said bullets and cartridges;whereby the ignition passage is relatively free.

3. A construction, as set forth in claim l. wherein said cartridge boresare arcuately displaced from said gun bores.

4. A gun perforator construction comprising: a. gun body defining aplurality of longitudinally extending ignition psages near the peripheryof the gun body, said gun body also defining sets of laterally directedgun bores and cartridge bores extending diametrically from each of saidignition passages and communicating with each other through their commonignition passage,

tion passages and communicating with each other through their commonignition passage,

each gun bore and corresponding cartridge bore being grouped-in closeproximity to each other to form a gun unit, the gun units of each setbeing arranged between those ofthe othervsets, the length ofignitionpassage between the .bores o1' each gun unit being materially less thanthe ignition passage length between gun units; bullets for said gunbores; and cartridges and seal plugs for said cartridge bores.

the gun and cartridge bores of each set being interposed between thoseof the other sets; bullets for said gun bores. and cartridges-and sealplugs for said cartridge bores. 'l

5. A gun perfcrator construction comprising: a gun body in the form of asolid cylinder and denning a plurality ofl longitudinally extendingignition passages near its periphery; said gun body also defining setsof laterally directed gun bores and cartridge bores in axially offsetplanes extending diametrically from each of said igni- 6. A gunperforator construction, as set forth in claim 4, wherein the cartridgebores are arcuately odset-with respect to each other and said ignitionpassages are eccentrically located with atleast oneof the bores of eachgun unit.

7. A gun perforator construction. as set forth in claim 5, wherein thecartridge bores are arcuately on'set with respect to each other and saidignition passages are eccentrically located with at least one of thebores oi each gun unit.

8. A gun perforator comprising: a gun body in the form of a solidcylinder, said gun body delining a laterally extending gun bore 'and alaterally oii'set cartridge bore intersecting the surface of said gunbody adjacent the muzzle end of said gun bore and being internallythreaded in part, said gun body also defining a longitudinal ignitionpassage intersecting the inner ends of and connecting said bores, saidgun bore and cartridge bore forminga gun unit; other gun unitsv in saidgun body communicating with said ignition passage and spaced asubstantially greater distance from each other than the spacingbeutviegn the gun bore and cartridge bore of each 9. A gun perforatorconstruction, as set forth in claim 8, wherein said gun body is providedwith several sets of gun units, the gun units of each set occupying asubstantially common plane and communicating with a common ignitionbore, and those of each set displaced circumferentially from the othersand interposed therebetween.

10. A gun perforator comprising: a gun body structure dening at leastone longitudinally extending ignition passage, at least one gun bore andat least one cartridge bore, the longer axes of both of said boresdisposed transversely to said ignition passage, .their inner endsintersecting said ignition passage and their outer ends forming openingsin the side walls of said gun body structure; a bullet for said gunbore; and a cartridge and sealing plug for said cartridge bore.

11. A construction as set forth in claim 10 wherein said cartridge boreis arcuately displaced from said gn bore.

12. A gun perforator comprising: a gun body structure defining at leastone longitudinal ignition passage located parallel to and adjacent theside wall of said body structure, at least one gun bore and at least onecartridge bore, both of said bores extending substantially crosswise ofsaid body structure and intersecting said ignition passage, both of saidbores occupying more than half the width of said gun body structure; abullet for said gun bore; yand a cartridge plug for said cartridge bore.

13. A construction as set forth in claim l2 wherein said cartridge borels arcuately displaced from said gun bore.

- GEORGE F. 'I-'URECHEK and sealing

